Tianjin Bohai Metal Corporation

API 5CT J55 seamless steel casing pipe

The J55 API casing or tubing is a relatively common one in oil drilling. Because of the low steel grade of J55, it is used for shallow oil and gas extraction.

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Commodity name: API 5CT J55 seamless steel casing pipe

The J55 API casing or tubing is a relatively common one in oil drilling. Because of the low steel grade of J55, it is used for shallow oil and gas extraction.

Product introduction

API 5CT J55 Casing Tubing serves to transport both crude oil and natural gas from oil and gas layer to the surface pipeline after
drilling is completed.It is able to bear the pressure produced by the exploitation process. After the outer surface is coated with
a protective layer, the tubing is marked in accordance with the API 5CT standard and strapped with metal belt.

J55 Casing is placed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from
rock formations and internal-yield pressure from fluid and gas. It must also hold its own deadweight and withstand the torque and
transaxial pressure placed on it while running downhole.

API 5CT J55 Casing Tubing Specification

Pipe Casing Sizes, Oilfield Casing Sizes & Casing Drift Sizes
Outer Diameter (Casing Pipe Sizes)	4 1/2"-20", (114.3-508mm)
Standard Casing Sizes	4 1/2"-20", (114.3-508mm)
Thread Type	Buttress thread casing, Long round thread casing, Short round thread casing
Function	It can protect the tubing pipe.

API 5CT J55 Casing Tubing Features

The surface of thread of coupling and API 5CT J55 Casing Tubing should be smooth without any tear, burr or other defects
that may have a negative impact on the strength and close connection.

API 5CT J55 Casing Tubing is offered with a free length range from 8m to 13m on basis of the SY/T6194-96 norm. However,
it is also available no less than 6m length and its quantity should be no more than 20%.

Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT J55 Casing Tubing coupling.

Any deformation such as crease, separation, hairline, crack or scab is not acceptable on both inner and outer surfaces of the product.
All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness.

Technical data

Size	Weight	Outside Diameter		Wall Thickness		End Finish
		Outside Diameter		Wall Thickness		Grade
		in	mm	in	mm	J55 K55
4 1/2	9.50	4.500	114.3	0.205	5.21	PS
	10.50			0.224	5.69	PSB
	11.60			0.250	6.35	PSLB
	13.50			0.290	7.37	–
	15.10			0.337	9.56	–
5	11.50	5.00	127.00	0.220	5.59	PS
	13.00			0.253	6.43	PSLB
	15.00			0.296	7.52	PSLB
	18.00			0.362	9.19	–
	21.40			0.437	11.10	–
	23.20			0.478	12.14	–
	24.10			0.500	12.70	–
5 1/2	14.00	5.500	139.7	0.244	6.20	PS
	15.50			0.275	6.98	PSLB
	17.00			0.304	7.72	PSLB
	20.00			0.361	9.17	–
	23.00			0.415	10.54	–
6 5/8	20.00	6.625	168.28	0.288	7.32	PSLB
	24.00			0.352	8.94	PSLB
	28.00			0.417	10.59	–
	32.00			0.475	12.06	–
7	17.00	7.00	177.80	0.231	5.87	–
	20.00			0.272	6.91	PS
	23.00			0.317	8.05	PSLB
	26.00			0.362	9.19	PSLB
	29.00			0.408	10.36	–
	32.00			0.453	11.51	–
	35.00			0.498	12.65	–
	38.00			0.540	13.72	–
7 5/8	24.00	7.625	193.68	0.300	7.62	–
	26.40			0.328	8.33	PSLB
	29.70			0.375	9.52	–
	33.70			0.430	10.92	–
	39.00			0.500	12.70	–
	42.80			0.562	14.27	–
	45.30			0.595	15.11	–
	47.10			0.625	15.88	–
8 5/8	24.00	8.625	219.08	0.264	6.71	PS
	28.00			0.304	7.72	–
	32.00			0.352	8.94	PSLB
	36.00			0.400	10.16	PSLB
	40.00			0.450	11.43	–
	44.00			0.500	12.70	–
	49.00			0.557	14.15	–
9 5/8	32.30	9.625	244.48	0.312	7.92	–
	36.00			0.352	8.94	PSLB
	40.00			0.395	10.03	PSLB
	43.50			0.435	11.05	–
	47.00			0.472	11.99	–
	53.50			0.545	13.84	–
	58.40			0.595	15.11	–
10 3/4	32.75	10.75	273.05	0.279	7.09	–
	40.50			0.350	8.89	PSB
	15.50			0.400	10.16	PSB
	51.00			0.450	11.43	PSB
	55.50			0.495	12.57	–
	60.70			0.545	13.84	–
	65.70			0.595	15.11	–
13 3/8	48.00	13.375	339.73	0.330	8.38	–
	54.50			0.380	9.65	PSB
	61.00			0.430	10.92	PSB
	68.00			0.480	12.19	PSB
	72.00			0.514	13.06	–
16	65.00	16	406.40	0.375	9.53	–
	75.00			0.438	11.13	PSB
	84.00			0.495	12.57	PSB
	109.00			0.656	16.66	P
18 5/8	87.50	18.625	473.08	0.435	11.05	PSB
20	94.00	20	508.00	0.438	11.13	PSLB
	106.50			0.500	12.70	PSLB
	133.00			0.635	16.13	PSLB

Tensile & Hardness Requirement

Grade	Type	Total elongation under load %	Yield strength MPa		Tensile strength min. MPa	Hardness a max.		Specified wall thickness mm	Allowable hardness variation b HRC
			min.	max		HRC	HBW
J55	-	0.5	379	552	517	-	-	-	-